HardLabs

Roscram01

rosco-m68k·hardware-projects·ram-expansion/design/kicad/roscram01.kicad_pcb

Roscram01 PCB layout, top view — open source board by rosco-m68k

About the Roscram01 PCB

Roscram01 is an open source PCB design by rosco-m68k, published on GitHub under the MIT license. It is a 2-layer board measuring 122 × 104 mm, with 28 components from 13 distinct parts.

Other key parts include the ATF16V8VQL-15PU, 74LS139, IS61C5128AL-10KLI, AS6C4008-55PCN and MCP2221AXP. By type, the board carries 11 capacitors, 9 ICs, 5 resistors, 1 transistor, 1 connector and 1 jumper.

From the project

Supporting hardware, expansions and projects for the rosco_m68k

This is a memory expansion for the rosco_m68k. It uses static RAM (AS6C4008, the same memory chip as the on-board RAM) and supports 1MB-4MB of RAM per board.

Multiple RAM expansions can co-exist in the same system due to the base address for the expansion being selectable by three jumpers on the board.

This will be available on Tindie soon. The board looks like this:

Roscram01, from the project README
From the project README

Main components on the Roscram01

ATF16V8VQL-15PU74LS139IS61C5128AL-10KLIAS6C4008-55PCNMCP2221AXP

Roscram01 bill of materials (BOM)

28 components, 13 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATF16V8VQL-15PU
IC1
1
74LS139
AS6C4008-55PCN
U1
4
IS61C5128AL-10KLI
AS6C4008-55PCN
U2, U6, U7, U8
2
AS6C4008-55PCN
U3, U4
1
MCP2221AXP
AS6C4008-55PCN
U5
1
2N3904
Q1
1
CONN_01X04_MALE
Conn_02x32_Odd_Even
J1
1
Conn_02x03_Odd_Even
JP1-3
9
100NF
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +1
2
100NF
100uF
C10, C11
1
5.1K
10K
R1
1
5.1K
100K
R2
3
10K
4K7
R3, R4, R5

Roscram01 design files

The KiCad project lives in the rosco-m68k/hardware-projects repository on GitHub; these links point at the commit this page was built from.

Roscram01: common questions

How big is the Roscram01 PCB?

The Roscram01 measures 122 × 104 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Roscram01?

28 components, from 13 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Roscram01 design files?

From the rosco-m68k/hardware-projects repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Roscram01 design in my own project?

Yes, under the terms of its MIT license, which rosco-m68k chose for the repository.

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